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Guide to the System Boiler Prices

Who offers the best system boiler prices in 2018? We compare 64 models of system boiler from eight leading boiler manufacturers in the UK, including Worcester, Baxi, Ideal and Valliant to see who offers the best boiler package.

The aim of this guide is to help you find the right system boiler. We have created some easy to use tables to help you pick the best boiler for your property according to price, performance, warranty and/or efficiency.

Using this Guide...

Most boiler manufacturers produce one or two models of system boiler with outputs between 12kW and 40kW. At the smaller model end, the price difference between the budget and the premium models is quite small. However the disparity grows significantly for the larger models.

To reflect the simplicity of this boiler type, we have grouped all boiler models together based on property size and put them in order of price low to high. Simply find your property size and find your boiler.

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We have identified ‘best buys’ in each size group. These reflect an all-round great package focusing on warranty length and efficiency relative to price. We have also highlighted best performance boilers, which are not necessarily the cheapest but offer great efficiencies and warranties.

System Boilers

Bedroom Flat

1-2 bed flat

Price

Standard warranty

Free extended warranty

Central heating output

Efficiency

Glow Worm Energy System

12

£712.00

2

2

12

89%

Vaillant ecoTEC plus system

12

£772.00

5

7-10

12

89%

Potterton Promax System

12

£794.00

2

2

12

89%

Vaillant ecoFIT pure system

12

£812.00

2

7-10

12

89%

Worcester Bosch Greenstar System i

12

£879.00

7

8

12

94%

Baxi Ecoblue System

12

£901.00

7

7

13

89%

Bedroom House

2 bed room house

Price

Standard warranty

Free extended warranty

Central heating output

Efficiency

Glow Worm Energy System

15

£731.00

2

2

15

89%

Ideal Logic System

15

£741.00

2

2

15

89%

Potterton Promax System

15

£808.00

2

2

15

89%

Ideal Logic + System

15

£809.00

7

7

15

89%

Vaillant ecoTEC plus system

15

£858.00

5

7-10

15

89%

Vaillant ecoFIT pure system

15

£875.00

2

7-10

15

89%

Baxi Ecoblue System

15

£923.00

7

7

17

89%

Worcester Bosch Greenstar System i

15

£926.00

7

8

15

94%

Ideal Vogue System

15

£944.00

8

10

15

93%

Bedroom House

3 bedroom house

Price

Standard warranty

Free extended warranty

Central heating output

Efficiency

Potterton Gold System

18

£566.00

2

2

18

88%

Ferroli Modena HE 18S

18

£575.00

5

5

17

89

Glow Worm Energy System

18

£757.00

2

2

18

89

Ideal Logic System

18

£810.00

2

2

18

89%

Potterton Promax System

18

£825.00

2

2

18

89%

Ideal Logic + System

18

£841.00

7

7

18

89%

Vaillant ecoFIT pure system

18

£931.00

2

7-10

18

89%

Vaillant ecoTEC plus system

18

£954.00

5

7-10

18

89%

Baxi Ecoblue System

18

£962.00

7

7

20

89%

Worcester Bosch Greenstar System i

18i

£974.00

7

8

18

94%

Viessmann 100-W System

19

£1,032.00

5

5

19

90

Worcester Bosch Greenstar System i

21

£1,014.00

7

8

21

94%

Ideal Vogue System

18

£1,015.00

8

10

18

93%

Viessmann 200-W System

19

£1,296.00

5

5

19

90

Bedroom House

4 bed house

Price

Standard warranty

Free extended warranty

Central heating output

Efficiency

Potterton Gold System

21

£589.00

2

2

24

88%

Ferroli Modena HE 25S

25

£588.00

5

5

25

89

Main System Eco Elite

24

£617.00

3

3

26

92

Glow Worm Energy System

25

£809.00

2

2

25

89

Ideal Logic System

24

£844.00

2

2

24

89%

Potterton Promax System

24

£863.00

2

2

25

89%

Ideal Logic + System

24

£872.00

7

7

24

89%

Worcester Bosch Greenstar System i

24i

£1,035.00

7

8

24

94%

Worcester Bosch Greenstar System i

27i

£1,042.00

7

8

27

92%

Baxi Ecoblue System

24

£1,053.00

7

7

27

89%

Viessmann 100-W System

26

£1,068.00

5

5

26

90

Ideal Vogue System

26

£1,169.00

8

10

26

93%

Vaillant ecoFIT pure system

25

£1,100.00

2

7-10

25

89%

Vaillant ecoTEC plus system

24

£1,137.00

5

7-10

24

89%

Viessmann 200-W System

26

£1,410.00

5

5

26

90

Vaillant ecoTEC exclusive

27

£1,438.00

5

7-10

27

90%

Bedroom House

Potterton Gold System

24

£609.00

2

2

28

88%

Main System Eco Elite

28

£680.00

3

3

29

92

Ferroli Modena HE 32S

32

£669.00

5

5

31

89

Glow Worm Energy System

30

£833.00

2

2

30

89

Ideal Logic System

30

£877.00

2

2

30

89%

Ideal Logic + System

30

£902.00

7

7

30

89%

Baxi Ecoblue System

28

£1,087.00

7

7

31

89%

Viessmann 100-W System

30

£1,100.00

5

5

30

90

Worcester Bosch Greenstar System i

30i

£1,112.00

7

8

30

92%

Worcester Bosch Greenstar System Cdi

30

£1,132.00

7

10

30

92%

Vaillant ecoTEC plus system

30

£1,173.00

5

7-10

30

89%

Vaillant ecoFIT pure system

30

£1,207.00

2

7-10

30

89%

Ideal Vogue System

32

£1,256.00

8

10

32

93%

Viessmann 200-W System

30

£1,519.00

5

5

30

90

Bedroom House

Larger properties

Price

Standard warranty

Free extended warranty

Central heating output

Efficiency

Potterton Promax System

32

£948.00

2

2

34

89%

Baxi Ecoblue System

30

£1,137.00

7

7

35

89%

Worcester Bosch Greenstar System CDI

35

£1,245.00

7

10

34

92%

Vaillant ecoTEC plus system

37

£1,312.00

5

7-10

37

89%

Viessmann 100-W System

35

£1,511.00

5

5

35

90

Viessmann 200-W System

35

£1,571.00

5

5

35

90

What would you like to find out next?

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Boiler Types and Selection – not sure whether to move to a system boiler? Read our guide to the pros and cons of sticking with your existing boiler type or changing to a new type.​